The small radical board can be used variously and disposes of a raster of 15 x 15 gaps. Besides of extracting any radicals it is used for the denomination of arithmetic products and for coefficient analyse. The article consists of 1 radical board made of wood, approx. 32 x 32 cm; 100 plugs, wood, red 100 plugs, wood, blue; 100 plugs, wood, green
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